Science Flashcards
6 cards from real NTN practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Science flashcards as text
What is the chemical formula for water?
Answer: H₂O
Water is composed of two hydrogen atoms bonded to one oxygen atom, giving it the formula H₂O.
Which layer of Earth's atmosphere contains the ozone layer?
Answer: Stratosphere
The ozone layer, which absorbs harmful UV radiation, is located in the stratosphere.
Which of the following is an example of a conductor?
Answer: Copper wire
Copper wire is an electrical conductor because it allows electrons to flow freely through it.
What is the role of the mitochondria in a cell?
Answer: Produce energy (ATP) through cellular respiration
Mitochondria generate ATP through cellular respiration, providing energy for the cell's activities.
If a substance has a pH of 2, it is classified as:
Answer: Strongly acidic
A pH of 2 indicates a strongly acidic substance; pH 7 is neutral and values above 7 are basic.
Which of the following best describes the scientific method?
Answer: A structured process of observation, hypothesis, testing, and conclusion
The scientific method is a systematic process of asking questions, forming hypotheses, conducting experiments, and drawing conclusions.